There are also a number of other fascinating facts about natural Baltic Amber it floats in salt water but sinks in fresh water; its hardness measures 2.0-2.5 on the Mohs Hardness Scale; its density amounts to 0.96-1.096g/cm3. When amber is touched with fire, it produces an aroma of burning pine.
Location of Tanggu on a map. Tanggu is a city found in Tianjin, China. It is located 39.02 latitude and 117.65 longitude and it is situated at elevation 6 meters above sea level. Tanggu has a population of 535,298 making it the 2nd biggest city in Tianjin. It operates on the CDT time zone, which means that it follows the same time zone as Tianjin. Quick facts
China has half of the world's top 6 city clusters (a.k.a. megalopolises or megaregions): 1  The Pearl River Delta (Population: 120 million, including Guangzhou, Shenzhen, Dongguan, Hong Kong, Foshan, Zhuhai, and Macau). 2  The Yangtze River Delta (88 million, including Shanghai, Nanjing, Hangzhou, Ningbo, Suzhou).